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Atoms — and the protons, neutrons, and electrons that compose them — are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g. When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu). The amu was originally defined based on hydrogen, the lightest element, then later in terms of oxygen. Since 1961, it has been defined with regard to the most abundant isotope of carbon, atoms of which...
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A Mass-Ratiometry-Based CD45 Barcoding Method for Mass Cytometry Detection.

Hongu Meng1, Antony Warden1, Lulu Zhang1

  • 11 Institute for Personalized Medicine, State Key Laboratory of Oncogenes and Related Genes, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China.

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|March 12, 2019
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Summary
This summary is machine-generated.

A new mass ratiometry barcoding method for mass cytometry (CyTOF) improves sample throughput and reduces costs. This technique enhances cell profiling by minimizing sample-to-sample variance and preserving surface markers.

Keywords:
barcodingmass cytometryratiometry

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Area of Science:

  • Biotechnology
  • Immunology
  • Analytical Chemistry

Background:

  • Mass cytometry (CyTOF) is essential for single-cell proteome analysis.
  • Sample-to-sample variance is a major challenge in CyTOF, often addressed by cell barcoding.
  • Conventional binary barcoding is inefficient and costly for large sample sizes.

Purpose of the Study:

  • To introduce a novel, cost-effective, and efficient cell barcoding method for CyTOF.
  • To overcome the limitations of existing binary barcoding strategies.
  • To improve the scalability and reduce the cost of CyTOF experiments.

Main Methods:

  • Developed a mass ratiometry-based barcoding technique using mass tags with fixed ratios.
  • Applied the method to label CD45 antibodies for sample barcoding.
  • Compared the new method with conventional binary barcoding strategies.

Main Results:

  • The mass ratiometry method exponentially increases barcoding capacity with fewer mass tags.
  • Reduced labeling time to 40 minutes and eliminated the need for expensive commercial reagents.
  • Preserved surface biomarker signals by avoiding pre-permeabilization of cells.

Conclusions:

  • This novel barcoding strategy offers a more efficient, cost-effective, and scalable solution for CyTOF analysis.
  • The method enhances data quality by reducing variance and preserving surface marker integrity.
  • It represents a significant advancement for high-throughput single-cell proteome profiling.